文献类型：期刊文献

英文题名：Morphological structure and physiological research of heterophylly in Potamogeton octandrus

作者：Li, Xiaoxia[1] He, Dingxuan[2,3] Guo, Youhao[2]

第一作者：李肖夏

通信作者：He, DX[1];He, DX[2]|[a0005d830ad879743d9d6]赫丁轩;

机构：[1]Chinese Acad Forestry, Beijing Key Lab Wetland Serv & Restorat, Inst Wetland Res, Xiangshan Rd, Beijing 100091, Peoples R China;[2]Wuhan Univ, Coll Life Sci, Lab Plant Systemat & Evolutionary Biol, Donghu South Rd, Wuhan 430072, Peoples R China;[3]Xinyang Agr & Forestry Univ, Sch Biol & Pharmaceut Engn, Xinyang 464000, Peoples R China

年份：2019

卷号：305

期号：3

起止页码：223-232

外文期刊名：PLANT SYSTEMATICS AND EVOLUTION

收录：;Scopus(收录号：2-s2.0-85060643101);WOS:【SCI-EXPANDED(收录号:WOS:000459488100004)】；

基金：This work was financially supported from the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFINT2014C14,CAFYBB2014QB04) and National Natural Science Foundation of China (31400166).

语种：英文

外文关键词：Anatomical structure; Chlorophyll; Endogenous hormone; Heterophylly; Potamogeton octandrus; Stomata

摘要：Heterophylly is regarded as a manifestation of aquatic plants adapting to environment in evolutionary process. We studied the morphological and anatomical structure of submerged and floating leaves of Potamogeton octandrus. The changes of four endogenous hormones levels during the development of heterophylly were measured. The results showed that the epidermis thickness of floating leaves increased significantly compared with submerged leaves. The stomata only distribute on floating leaves, and the upper epidermis had obvious wax. While the submerged leaf epidermis was smooth and had no waxy ornamentation, chlorophyll content of floating leaves was significantly higher than that of submerged leaves. The four endogenous hormones showed a different change pattern in the development process of submerged and floating leaves. ABA content showed a trend of increased first and then decreased in the development of submerged leaves, while it gradually increased in floating leaves. GA(3) content decreased significantly in the development of floating leaves, but showed an upward trend in submerged leaves. ZT content generally increased during the development of submerged and the floating leaves, while IAA content was the highest in the shoot and then declined rapidly. The difference characteristics in submerged and floating leaves can be considered as adaptation mechanism in plants development, and the four endogenous hormones may play different roles in development stages of heterophylly.